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Polypropylene foaming material and production method thereof

A foamed material and polypropylene technology, which is applied in the production field of polypropylene foamed materials, can solve the problems of high manufacturing cost and difficult recycling, and achieve the effects of no environmental pollution, low production cost and safe production method.

Inactive Publication Date: 2009-09-23
合肥朗润中科材料有限公司
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Problems solved by technology

[0012] Chinese patent document: CN101081914A, which discloses a "polypropylene foaming material and its preparation method". This method uses a chemical foaming agent to foam the polypropylene composition after radiation crosslinking. The manufacturing cost of this method is relatively high. And the foaming material is a cross-linked product, which is difficult to recycle

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  • Polypropylene foaming material and production method thereof

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Embodiment Construction

[0045] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0046] The production method of polypropylene foam material comprises the following steps successively:

[0047]① Evenly mix polypropylene resin, nucleating agent, antioxidant, coloring agent and appropriate amount of lubricant, filler and other additives according to a certain weight ratio;

[0048] ②Extrude and granulate the above mixture through a twin-screw extruder into raw materials that can be used for foaming;

[0049] ③Take the above raw materials and place them in a special foaming extruder, and at the same time inject a supercritical fluid with a weight ratio of 0.1 to 20 parts as a foaming agent. And take shape.

[0050] Among them, the foaming extruder is a single-screw extruder, two serial single-screw extruders, or a co-rotating twin-screw extruder in series with a single-screw extruder, and the die can be a circular die, an a...

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Abstract

The invention discloses a polypropylene foaming material. The polypropylene foaming material comprises the following components according to proportioning by weight: 60-99 parts of polypropylene resin; 0.1-10 parts of nucleating agent; 0.1-5 parts of antioxidant; 0-5 parts of colorant; 0-5 parts of lubricant; and 0-20 parts of filling material; and the melt index of the polypropylene resin is 0.1-20 g / 10 min, and the foaming process adopts supercritical fluid as the foaming agent, i.e. 0.1-20 parts of supercritical fluid (proportioning by weight). The invention also discloses a production method of the foaming material. Compared with the prior art, the invention has the advantages that the universal polypropylene can be adopted as a base material, no polymer is provided, the cross-linking reaction does not occur, the foaming process is free from environmental pollution, and the production method is safe; the quality of the obtained foaming material is stable, the foaming percentage and the cell density are high, the distribution is uniform, and the invention is suitable for the industrial production at a large scale; and meanwhile, the overall production method is simple, the operation is easy, and the production cost is relatively lower.

Description

technical field [0001] The invention relates to a polypropylene foam material, and also relates to a production method of the polypropylene foam material. Background technique [0002] Foam plastic has the advantages of light weight, heat insulation, cushioning, insulation, anti-corrosion, and low price, so it is widely used in daily necessities, packaging, industry, agriculture, transportation, military industry, and aerospace industry. The main varieties are polyurethane (PU ) soft and rigid foam, polystyrene (PS) foam and polyolefin foam three categories. However, there are isocyanate residues harmful to the human body during the foaming process of polyurethane foam, and the foamed material cannot be recycled. However, chlorofluorocarbons or butane are usually used in the foaming process of polystyrene (PS), which has adverse effects on the environment. The product is difficult to degrade and easily forms "white pollution". The United Nations Environmental Protection Org...

Claims

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Application Information

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IPC IPC(8): C08L23/10C08J9/00C08K3/00B29C47/00
Inventor 郑文革严庆吴飞赵超
Owner 合肥朗润中科材料有限公司
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